7x = -95,4 - 2x
7x + 2x = -95,4
9x = -95,4
x = -95,4 : 9
x = -10,6
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5/6y - 3/4y + 1 = 2/3y - 1/6 /*12
10y - 9y + 12 = 8y - 2
y + 12 = 8y - 2
8y - y = 12 + 2
7y = 14
y = 14 : 7
y = 2
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2)
2x - 37 = x + 50
2x - x = 50 + 37
x = 87 зрителей во втором зале
87 * 2= 174 зрителя в первом зале
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3)
8*(3y - 4) = 3*(y - 2)
24y - 32 = 3y - 6
24y - 3y = -6 + 32
21y = 26
y = 26 : 21
y = 1 5/21